登入
選單
返回
Google圖書搜尋
Final and Summary Report on Metallurgical Quality of Steels Used for Hull Construction
Alexander Boodberg
C. E. Sims
C. Wagner
G. Sachs
R. W. Bennett
E. P. Klier
Earl Randall Parker
H. M. Banta
L. J. Ebert
P. J. Rieppel
A. L. Walters
A. W. Dana
C. B. Voldrich
出版
Committee on Ship Construction, Division of Engineering and Industrial Research, National Research Council
, 1948
URL
http://books.google.com.hk/books?id=9AY10QEACAAJ&hl=&source=gbs_api
註釋
A detailed study was made of a low carbon ship plate steel, both 'as received' and 'as welded', by utilizing hardness tests and eccentric notch bar static tension tests at various temperatures. Considerable nonuniformity was revealed in the 'as received' plate, that is, localized areas showed relatively high transition temperatures. A brittle-ductile transition zone was found to exist between -40 and -80F for the investigated steel. A zone of maximum hardness occurred at the junction of the weld metal and the heat affected zone, from which the hardness (Rockwell B) approached that of the unaffected plate. A zone of minimum ductility (eccentric notch strength) was found 0.3 to 0.4 inch from the weld centerline. This zone was located by using the eccentric notch bar tension test at low temperatures. The zone of low ductility is thought to be the zone which is heated to the maximum subcritical temperature, with the further possibility of embrittlement by strain aging and intermediate transformation products. (Author)
